//// "$Id: Fl_Text_Buffer.H 4288 2005-04-16 00:13:17Z mike $"//// Header file for Fl_Text_Buffer class.//// Copyright 2001-2005 by Bill Spitzak and others.// Original code Copyright Mark Edel.  Permission to distribute under// the LGPL for the FLTK library granted by Mark Edel.//// This library is free software; you can redistribute it and/or// modify it under the terms of the GNU Library General Public// License as published by the Free Software Foundation; either// version 2 of the License, or (at your option) any later version.//// This library is distributed in the hope that it will be useful,// but WITHOUT ANY WARRANTY; without even the implied warranty of// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU// Library General Public License for more details.//// You should have received a copy of the GNU Library General Public// License along with this library; if not, write to the Free Software// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307// USA.//// Please report all bugs and problems on the following page:////     http://www.fltk.org/str.php//#ifndef FL_TEXT_BUFFER_H#define FL_TEXT_BUFFER_H/* Maximum length in characters of a tab or control character expansion   of a single buffer character */#define FL_TEXT_MAX_EXP_CHAR_LEN 20#include "Fl_Export.H"class FL_EXPORT Fl_Text_Selection {  friend class Fl_Text_Buffer;  public:    void set(int start, int end);    void set_rectangular(int start, int end, int rectStart, int rectEnd);    void update(int pos, int nDeleted, int nInserted);    char rectangular() { return mRectangular; }    int start() { return mStart; }    int end() { return mEnd; }    int rect_start() { return mRectStart; }    int rect_end() { return mRectEnd; }    char selected() { return mSelected; }    void selected(char b) { mSelected = b; }    int includes(int pos, int lineStartPos, int dispIndex);    int position(int* start, int* end);    int position(int* start, int* end, int* isRect, int* rectStart, int* rectEnd);  protected:    char mSelected;    char mRectangular;    int mStart;    int mEnd;    int mRectStart;    int mRectEnd;};typedef void (*Fl_Text_Modify_Cb)(int pos, int nInserted, int nDeleted,                                  int nRestyled, const char* deletedText,                                  void* cbArg);typedef void (*Fl_Text_Predelete_Cb)(int pos, int nDeleted, void* cbArg);class FL_EXPORT Fl_Text_Buffer {  public:    Fl_Text_Buffer(int requestedSize = 0);    ~Fl_Text_Buffer();    int length() { return mLength; }    char* text();    void text(const char* text);    char* text_range(int start, int end);    char character(int pos);    char* text_in_rectangle(int start, int end, int rectStart, int rectEnd);    void insert(int pos, const char* text);    void append(const char* t) { insert(length(), t); }    void remove(int start, int end);    void replace(int start, int end, const char *text);    void copy(Fl_Text_Buffer* fromBuf, int fromStart, int fromEnd, int toPos);    int undo(int *cp=0);    void canUndo(char flag=1);    int insertfile(const char *file, int pos, int buflen = 128*1024);    int appendfile(const char *file, int buflen = 128*1024)      { return insertfile(file, length(), buflen); }    int loadfile(const char *file, int buflen = 128*1024)      { select(0, length()); remove_selection(); return appendfile(file, buflen); }    int outputfile(const char *file, int start, int end, int buflen = 128*1024);    int savefile(const char *file, int buflen = 128*1024)      { return outputfile(file, 0, length(), buflen); }    void insert_column(int column, int startPos, const char* text,                       int* charsInserted, int* charsDeleted);    void replace_rectangular(int start, int end, int rectStart, int rectEnd,                             const char* text);    void overlay_rectangular(int startPos, int rectStart, int rectEnd,                             const char* text, int* charsInserted,                             int* charsDeleted);    void remove_rectangular(int start, int end, int rectStart, int rectEnd);    void clear_rectangular(int start, int end, int rectStart, int rectEnd);    int tab_distance() { return mTabDist; }    void tab_distance(int tabDist);    void select(int start, int end);    int selected() { return mPrimary.selected(); }    void unselect();    void select_rectangular(int start, int end, int rectStart, int rectEnd);    int selection_position(int* start, int* end);    int selection_position(int* start, int* end, int* isRect, int* rectStart,                           int* rectEnd);    char* selection_text();    void remove_selection();    void replace_selection(const char* text);    void secondary_select(int start, int end);    void secondary_unselect();    void secondary_select_rectangular(int start, int end, int rectStart,                                      int rectEnd);    int secondary_selection_position(int* start, int* end, int* isRect,                                     int* rectStart, int* rectEnd);    char* secondary_selection_text();    void remove_secondary_selection();    void replace_secondary_selection(const char* text);    void highlight(int start, int end);    void unhighlight();    void highlight_rectangular(int start, int end, int rectStart, int rectEnd);    int highlight_position(int* start, int* end, int* isRect, int* rectStart,                           int* rectEnd);    char* highlight_text();    void add_modify_callback(Fl_Text_Modify_Cb bufModifiedCB, void* cbArg);    void remove_modify_callback(Fl_Text_Modify_Cb bufModifiedCB, void* cbArg);    void call_modify_callbacks() { call_modify_callbacks(0, 0, 0, 0, 0); }    void add_predelete_callback(Fl_Text_Predelete_Cb bufPredelCB, void* cbArg);    void remove_predelete_callback(Fl_Text_Predelete_Cb predelCB, void* cbArg);    void call_predelete_callbacks() { call_predelete_callbacks(0, 0); }    char* line_text(int pos);    int line_start(int pos);    int line_end(int pos);    int word_start(int pos);    int word_end(int pos);    int expand_character(int pos, int indent, char *outStr);    static int expand_character(char c, int indent, char* outStr, int tabDist,                                char nullSubsChar);    static int character_width(char c, int indent, int tabDist, char nullSubsChar);    int count_displayed_characters(int lineStartPos, int targetPos);    int skip_displayed_characters(int lineStartPos, int nChars);    int count_lines(int startPos, int endPos);    int skip_lines(int startPos, int nLines);    int rewind_lines(int startPos, int nLines);    int findchar_forward(int startPos, char searchChar, int* foundPos);    int findchar_backward(int startPos, char searchChar, int* foundPos);    int findchars_forward(int startPos, const char* searchChars, int* foundPos);    int findchars_backward(int startPos, const char* searchChars, int* foundPos);    int search_forward(int startPos, const char* searchString, int* foundPos,                       int matchCase = 0);    int search_backward(int startPos, const char* searchString, int* foundPos,                        int matchCase = 0);    int substitute_null_characters(char* string, int length);    void unsubstitute_null_characters(char* string);    char null_substitution_character() { return mNullSubsChar; }    Fl_Text_Selection* primary_selection() { return &mPrimary; }    Fl_Text_Selection* secondary_selection() { return &mSecondary; }    Fl_Text_Selection* highlight_selection() { return &mHighlight; }  protected:    void call_modify_callbacks(int pos, int nDeleted, int nInserted,                               int nRestyled, const char* deletedText);    void call_predelete_callbacks(int pos, int nDeleted);    int insert_(int pos, const char* text);    void remove_(int start, int end);    void remove_rectangular_(int start, int end, int rectStart, int rectEnd,                             int* replaceLen, int* endPos);    void insert_column_(int column, int startPos, const char* insText,                        int* nDeleted, int* nInserted, int* endPos);    void overlay_rectangular_(int startPos, int rectStart, int rectEnd,                              const char* insText, int* nDeleted,                              int* nInserted, int* endPos);    void redisplay_selection(Fl_Text_Selection* oldSelection,                             Fl_Text_Selection* newSelection);    void move_gap(int pos);    void reallocate_with_gap(int newGapStart, int newGapLen);    char* selection_text_(Fl_Text_Selection* sel);    void remove_selection_(Fl_Text_Selection* sel);    void replace_selection_(Fl_Text_Selection* sel, const char* text);    void rectangular_selection_boundaries(int lineStartPos, int rectStart,                                          int rectEnd, int* selStart,                                          int* selEnd);    void update_selections(int pos, int nDeleted, int nInserted);    Fl_Text_Selection mPrimary; /* highlighted areas */    Fl_Text_Selection mSecondary;    Fl_Text_Selection mHighlight;    int mLength;                /* length of the text in the buffer (the length                                   of the buffer itself must be calculated:                                   gapEnd - gapStart + length) */    char* mBuf;                 /* allocated memory where the text is stored */    int mGapStart;              /* points to the first character of the gap */    int mGapEnd;                /* points to the first char after the gap */    // The hardware tab distance used by all displays for this buffer,    // and used in computing offsets for rectangular selection operations.    int mTabDist;               /* equiv. number of characters in a tab */    int mUseTabs;               /* True if buffer routines are allowed to use                                   tabs for padding in rectangular operations */    int mNModifyProcs;          /* number of modify-redisplay procs attached */    Fl_Text_Modify_Cb*          /* procedures to call when buffer is */    mNodifyProcs;               /* modified to redisplay contents */    void** mCbArgs;             /* caller arguments for modifyProcs above */    int mNPredeleteProcs;	/* number of pre-delete procs attached */    Fl_Text_Predelete_Cb*	/* procedure to call before text is deleted */	 mPredeleteProcs;	/* from the buffer; at most one is supported. */    void **mPredeleteCbArgs;	/* caller argument for pre-delete proc above */    int mCursorPosHint;         /* hint for reasonable cursor position after                                   a buffer modification operation */    char mNullSubsChar;         /* NEdit is based on C null-terminated strings,                                   so ascii-nul characters must be substituted                                   with something else.  This is the else, but                                   of course, things get quite messy when you                                   use it */    char mCanUndo;		/* if this buffer is used for attributes, it must				   not do any undo calls */};#endif//// End of "$Id: Fl_Text_Buffer.H 4288 2005-04-16 00:13:17Z mike $".//